Home / 3,990.26-5,506.45-2,311.81

Finding the Fourth Proportional to 3,990.26, 5,506.45 and 2,311.81

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Solution

The fourth proportional to 3,990.26, 5,506.45 and 2,311.81 is: 3,190.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.26 : 5,506.45 = 2,311.81 : x
  2. Step 2: Convert to fraction form
    3,990.26/5,506.45 = 2,311.81/x
  3. Step 3: Cross multiply
    3,990.26x = 5,506.45 × 2,311.81
  4. Step 4: Simplify right side
    3,990.26x = 12,729,846.63
  5. Step 5: Solve for x
    x = 12,729,846.63/3,990.26
  6. Step 6: Final answer
    x = 3,190.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.